A while (or may be a year ago), I blogged about the White Screen of Darn. It came with the Visual Studio 2005 designer, and occurs when for a reason designer couldn't render (generally referenced 3rd party) UI components.

And, it happens again.

With the new Visual Studio 2008 interface also we have a new WSoD error screen :).

The problem shows in a form, when an assembly of a 3rd party UI component directly or indirecly referenced multiple times. As the problematic error message will be like "type Asy1.TypeA couldn't be cast to Asy1.TypeA", this shows us, VS designer wrongly assumes same types as different types.

And here is the resolution: Clean the project, and Build it again.

Then, VS corrects its mistake, and shows designer without errror. ;)

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